Orange wool-dye.



UNITED STATES PATENT OFFICE;

RICHARD KOTHE, 0F VOHWINKEL, OSCAR DRESSEL, 0F ELBERFELD, AND HEINRICH HOEBLEIN, 0E VOHWINKEL, GERMANY, ASSIGNORS TO FARBENFABRTKEN VORM. FRIEDB. BAYER do 00., OF ELBERFELD, GERMANY, A. CORPORATION OF GERMAN cannon wooL-nYE.

No Drawing.

" noarylsulfonamids with acidylized aminonaphthol sulfonic acids.

The new dyestuffs having most probably the general formula:

Al X

(A aryl, A and A hydrogen or a substituent, X hydrogen 'or a sulfonic group) are after being dried and pulverized in the shape of their alkaline salts from yellowishred to violet powders soluble in water and in concentrated sulfuric acid with from an orange to red to violet color; yielding u on reduction with stannous chlorld and by rochloric acid an aminoarylsulionamid and a diaminonaphthol sulfonlc acid. They dye wool from orange to blue-red shades which are remarkable for their excellent :Eastness to millin ,washing and light.

In or or to illustrate the new process more fully the following example is given, the parts being by weight-29.2 parts of Q-tcluidin-4sulfon-ortho-anisidid (c ,H, on, 1 NH, so nno in :o'cii,

after being dried and pulverized in the Specification of Iietters Patent.

Application filed May 17, 1811. Serial No. 627,810.

Patented Oct. 10, 1911.

shape of its sodium salt a red powder hav- 111;: most probably the formula soluble in Water with an orange-red and in concentrated sulfuric acid with a red color. It dyes wool from acid baths brilliant. orange even shades fast to light and to milling. Upon treatment with stannous chlorid and hydrochloric acid it is split up, 2- toluidiu--sulfon-ortho-anisidid and 2.6-di amino-5-naphthol-7-sulfonic acid being obtained.

The process is carried out in an analogous manner on starting from other sulfonamids, e. g. aminophenylsulfonamid (NI-l' C H -SO NHJ 2-toluidin-4-sulfontoluidid:

(C H CH I NH SO NHG l-l (OIL) 4:-toluidinQ-sulfonybl-naphthylamin-5-sul-- fonic acid:

, isoi-nn-cmne-sona,

orylsulfonemids with acidglized aminonaphthol sulfonic acids, w ieh dyes are after being dried and ulverized in the she e of their alkaline so, ts from orange to red ish-brown owders soluble in water and in concentrated sulfuric acid with fromen orange to red color; yielding upon treatment with stannous chlorid and hydrochloric acid an aminoarylsulfonamid and a djaminonaphthol sulfonic acid and dyeing wool from acid baths from orange to re shades, substantially '51s described.

2. The herein described new dyestufi having most probably the formula:

CHI so,H K11 00011- Or-NK-(hHdOGH:

which is after being dried and pulverized in the shape of its sodium salt a, red powder soluble-in water with an orange-red end in concentrated sulfuric acid with a, red color; yielding upon reduction with stannous chlorid and hydrochloric acid 2-toluidin-4- sulfo ortho anisidid and 2.,6 -',diamino 5- naphthol-7-Sulfoni0 acid and dyeing wool from acid baths brilliant orange shades, substantially as described. f

In testimony whereof we have hereunto set ourvhnnds in the presence of two subscribing witnesses.

3mm) KOTHE. [13.8.] OSCAR. DRESSEL. L 5. HEINRICH *HOERLEIN. 11. 8.

Witnesses:

Cues. J. WRIGHT Annnn'r Annex. 

